## A Triangle and its Circumcircle
[ << Back to Figure 2 ]
This applet demonstrates the construction of the circumcircle of a given triangle *ABC*. The perpendicular bisectors of the sides of triangle *ABC*
intersect at a point *F*. The distance from *F* to each of the points *A*, *B*, and *C* is the same, say *r*. Therefore, the circle with center *F* and radius *r* passes through all three points A, B and C.
In the applet, you may click and drag the points *A*, *B*, and *C*; the corresponding triangle and its circumcircle will be drawn.
Bradley and Stemkoski, Created with GeoGebra |